Unnecessary Exact Solutions of Nonlinear Ordinary Differential Equations

Details Unnecessary Exact Solutions of Nonlinear Ordinary Differential Equations Unnecessary Exact Solutions of Nonlinear Ordinary Differential Equations

2010-11-07

arxiv.org/abs/1011.1623v1

Nonlinear Sciences

Exactly Solvable and Integrable Systems

13 pages

Scientific paper

We analyze the paper by Wazwaz and Mehanna [Wazwaz A.M., Mehanna M.S., A variety of exact travelling wave solutions for the (2+1) -- dimensional Boiti -- Leon -- Pempinelli equation, Appl. Math. Comp. 217 (2010) 1484 -- 1490]. Using the tanh -- coth method and the Exp -- function method the authors claim that they have found exact solutions of the (2+1) -- dimensional Boiti -- Leon -- Pempinelli equation. We demonstrate that the authors have obtained the exact solutions of the well known nonlinear ordinary differential equation. We illustrate that all solutions presented by the authors can be reduced to the well-known solutions. Wazwaz and Mehanna made a number of typical mistakes in finding exact solutions of nonlinear differential equations. Taking the results of this paper we introduce the definition of unnecessary exact solutions for the nonlinear ordinary differential equations.

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